由良産商株式会社　特販部　特販課 List of Products and Services

The "A2-100" is a low-head hex socket bolt made from high-strength stainless steel (SUS304CUN). While improving strength, which is important when considering compactness and lightweight design, the head is kept low to achieve space-saving. It is common for stainless steel low-head bolts to have no strength guarantee equivalent to A2-50, but this product guarantees a tensile strength of 1,000 N/mm². 【Features】 ■ Enables high strength and lightweight design ■ Achieves space-saving with a low head ■ Can replace SCM products ■ Strength guarantee *For more details, please refer to the PDF document or feel free to contact us.

Yura Sangyo Co., Ltd.'s Special Sales Department handles 'No. 0 small screws' for precision equipment, commonly referred to as "camera screws" and "precision screws." These are small screws with a pan head height that is approximately 50% lower for Type 1 and about 30% lower for Type 3 compared to the JIS B1111 appendix. All stock items can be shipped in units of 1,000 pieces. Sizes, shapes, and surface treatments can also be customized to order. 【Features】 ■ Material: SWCH16A (aluminum killed steel) ■ Surface treatment: Nickel plating / Trivalent chromate plating ■ All stock items can be shipped in units of 1,000 pieces ■ Sizes, shapes, and surface treatments can also be customized to order *For more details, please refer to the PDF document or feel free to contact us.

Yura Sangyo Co., Ltd. is a comprehensive wholesale distributor of screws and fastening components, headquartered in Tachiuri-bori, Nishi Ward, Osaka City, which has long been known as a town of steel product wholesalers. In response to the increasing sophistication of demands, we aim to contribute further to our customers by not only functioning as a "wholesaler" that supplies products just-in-time, stored like a dam, but also by developing and selling high-strength and high-function fasteners as a "technical trading company" that solves the problems faced by our customers. Additionally, in our Aerospace Division, we have successfully entered the aircraft industry. Our company views the commonplace item "screw" as a "critical safety component" that requires high quality assurance and low environmental impact, and we promise to contribute to our customers and society through high-quality screw products. 【Business Activities】 ■ Comprehensive wholesale sales of fastening components such as bolts and nuts *For more details, please refer to the PDF materials or feel free to contact us.

The "fix-F4(+) Nabebisu/WH" is a screw with a loosening prevention function that achieves weight reduction by eliminating the need for flat washers and spring washers. By removing the resistance type loosening prevention that uses nylon or silicone-based resin, which is more expensive than screws, cost reduction with screws becomes possible. Additionally, it prevents the tilting of screws caused by spring washers and the overlapping of flat washers, which can lead to stoppages in automated lines. 【Features】 ■ Significant cost reduction ■ Reusable ■ Achieves weight reduction by eliminating the need for flat washers and spring washers ■ No need for incomplete screw parts due to the thickness of the assembly ■ Prevents stoppages in automated lines *For more details, please refer to the PDF document or feel free to contact us.

We would like to introduce the "PEEK products" handled by Yura Sangyo Co., Ltd. Our lineup includes various products such as "(+) pot micro," "(+) small screws," and "hex bolts," as well as "hex nuts and washers." These products excel in heat resistance, fatigue resistance, impact resistance, and creep resistance, and are usable in all chemical environments except concentrated sulfuric acid. They are used in parts for LCD manufacturing equipment, medical devices, cleaning jigs, chemical-related equipment parts, and precision machinery parts. 【Features】 ■ PEEK (Polyether Ether Ketone) ■ Continuous use temperature: 180℃ ■ Highest level of chemical resistance among plastics ■ Excellent heat resistance, fatigue resistance, impact resistance, and creep resistance ■ Does not contain any of the six substances restricted by the ROHS directive *For more details, please refer to the PDF materials or feel free to contact us.

This product features a small screw with a head height that is approximately 50% lower for Type 1 and about 30% lower for Type 3 compared to the JIS B1111 appendix. We offer a variety of products including "No. 0 Type 1 (+) pan head screws with nickel plating" and "No. 0 Type 1 (+) pan head screws with trivalent chromate plating." All stock items can be shipped in units of 1,000 pieces. Additionally, we can accommodate other sizes, shapes, and surface treatments through made-to-order production. 【Features】 ■ Japanese Camera Industry Association standard (JCIS10-70) ■ All stock items can be shipped in units of 1,000 pieces ■ Other sizes, shapes, and surface treatments can also be accommodated through made-to-order production ■ Material: SWCH16A (aluminum-killed steel) ■ Surface treatment: nickel plating, trivalent chromate plating *For more details, please refer to the PDF document or feel free to contact us.

We would like to introduce the "Hexagon Bolt - Hot-Dip Galvanized" handled by Yura Sangyo. Many standard 8.8 hexagon bolts are made from boron steel or SWCH35K, but our product uses "SCM435" and is managed under suitable heat treatment conditions, ensuring a strength of 8.8 even after being treated at high temperatures during the hot-dip galvanization process. Additionally, mill sheets and product inspection certificates (including tensile test results after surface treatment) can be issued for a fee. Please feel free to contact us when needed. [Features] ■ Uses SCM435 ■ HDZ35 ■ 8.8 strength guarantee *For more details, please refer to the PDF materials or feel free to contact us.

JIS B1180 Appendix - Incorporation of Spring Washers with Hex Bolts of Strength Class 10.9 The "P-2" spring washer and ISO flat washer "I-3" have introduced "trivalent chromate." This product incorporates spring washers with a hardness of 40-50 HRC and round washers made of S55C into SCM hex bolts, reducing the labor of incorporating spring washers and round washers, preventing forgetfulness in assembly, and making it suitable for use in areas where conventional iron products lack strength. 【Product Specifications (Bolt)】 ■ Strength Class: 10.9 ■ Material: Structural Alloy Steel (SCM) ■ Precision: JIS 6g *For more details, please refer to the PDF document or feel free to contact us.

Stainless steel can generate friction heat during tightening, causing the screw part to expand and potentially leading to the phenomenon of "seizing/binding." To address this issue, our product applies a fluoropolymer resin thoroughly to control the friction coefficient during tightening, thereby preventing the occurrence of seizing in bolt-nut engagements under normal conditions. Compared to domestic products, it offers excellent cost performance and does not reach the level of seizing even under conditions of repeated use up to five times. 【Features】 ■ All units selected from domestic manufacturers ■ Manufacturer's product warranty included (with engraving) ■ Superior cost performance compared to domestic products ■ Does not reach the level of seizing even under conditions of repeated use up to five times *For more details, please refer to the PDF document or feel free to contact us.

The "Yakituka Nut" is a heat-resistant nut made of stainless steel, coated with a multilayer plating (YK coat) developed by Yudensha Co., Ltd. With its high adhesion, the plating is resistant to peeling, maintaining its anti-seizing effect even after repeated use. The dry finish eliminates dripping, similar to using lubricating oil, and requires no application time. Additionally, it features a distinctive cloudy color compared to typical stainless steel nuts, and due to the difference in color compared to other stainless materials, we can accommodate requests for a natural finish where the outer layer is removed while leaving the three-layer plating on the threaded part. [Features] ■ Can be applied to aluminum ■ Natural finish available ■ Other shapes and sizes can be accommodated *For more details, please download the PDF or feel free to contact us.